Sand conditioning apparatus



Oct. 18, 1938. s. B. DAVIES SAND CONDITIONING APPARATUS Filed Dec. 24,1936 3 Sheets-Sheet 1 Stanley 5- Davies Oct. 18, 1938. s. B. DAVIES SANDCONDITIONING APPARATUS Filed Dec. 24, 1956 3 Sheets-Sheet 2 S. B. DAVIESSAND CONDITIONING APPARATUS Filed Dec. 24, 1936 3 Sheets-Sheet 5S'arzZczy ,5. Davies MW?) r Patented Oct. 18, 1938 UNITED STATES PATENTOFFICE SAND CONDITIONING APPARATUS Application December 24, 1936, SerialNo. 117,609

13 Claims. (01. 259-144) This invention relates to conditioningapparatus and particularly to that type which reconditions material, byfirst passing it through a screening and a scrap removing device whichremoves metal and other foreign matter, and then through a treating andblending device which breaks up the material and discharges itthoroughly reconditioned.

It is here shown as adapted to the reconditioning of molders sand,although it may obviously be used with other materials.

The primary object of the present invention is to associate thescreening device and the sand treating device so that they may beoperated as a unit or individually, as may be desired,

and thus provide greater flexibility of the apparatus than hasheretofore been possible.

With the foregoing and other objects in view, the invention will now bemore particularly described, reference being had to the accompanyingdrawings, wherein:

Figure 1 is a side elevation of the sand conditioning apparatus.

Figure 2 is a section taken on line 2--2 of Figure 1.

Figure 3 is a modification of the front of the frame showing the frontlocking element.

Figure 4 is a section taken on line 4-4 of Figure 2. Figure 5 is asection taken on line 55 of Figure 1.

Figure 6 is a section taken on line 6-6 of Figure 2. a

Figure 7 is an enlarged fragmentary view of the rear portion of the sandtreating device, and Figure 8 is an enlarged fragmentary view of theweight lifting mechanism of the screening device.

Generally, the present sand conditioning apparatus comprises arectangular open frame structure supporting an upper screening and scrapremoving device. The lower portion of the frame also houses a sandtreating and blending device. The discharge spout of the screen ispositioned to direct the material into the hopper of the sand treatingand blending device where it falls upon a sand treating belt whichbreaks up the material and discharges it in a stream from the upper endof the belt. The base of the frame is so designed as to combine readilywith and rigidly retain the sand treating device in operative relationto the screen and scrap remover, but at the same time permit the formerto be released from its frame in order that it may be used as a separateunit wherever desired. This is accomplished by removing a section of thebase which locks the device in operative position in the frame.

Referring now to. Figure 1, there is disclosed one embodiment of theinvention wherein the 5 numeral I0 designates the open frame whichhouses and fixedly supports the screen and sand treating device. Thisframe is preferably made up of vertically extending spaced frame membersII of angle iron formation, upper and lower 10 horizontal frame membersl2 and I3, and intermediately spaced horizontal frame members Theselatter frame members, together with suitable interiorly arranged framemembers M are designed to support the screening and scrap 15- removingdevice I5. This device comprises two sets of screening units I6 and I1and material retarding weighted levers I8 positioned above the screeningunits. A hopper i9 is provided for directing the sand or other materialto the 20 screening units and this comprises a plurality of inclinedplates having their upper ends secured to the top frame members 12 anddiverging inwardly and downwardly to a point above the screening units.25

The screening device is provided with a discharge hopper 20 projectingdownwardly below the intermediate frame members l3 and so-positioned asto direct the material into the hopper 2| of a sand treating andblending device 22. 30 This device includes, in addition to the hopper2|, a sand receiving and treating belt 23, which is operated at a highrate of speed in order that the sand may be completely broken up,conditioned, and then thrown outwardly and'dis- 35 charged from theupper end of the belt.

The belt is mounted in a frame 24 carrying a rear axle 25 upon which arejournaled rollers 26. Atthe front of the frame is, a swivel casing 21which supports a swivel 28. This swivel carries 40 at its lower end anaxle 29 which has mounted thereon front rollers 30.

The base of the frame In, as outlined above, is designed to receive andlock the sand treating device 22 in operative relation with the screen-45 ing device and at the same time permit the sand treating device to bequickly removed from the frame so that it may be used individually as aseparate unit wherever desired. To permit disengagement of the device 22from the frame, 5 the base of the main frame is provided with a frontextension 3| comprising forwardly converging angle irons 32 and 33respectively and a front angle bar 34 connecting the members 32 and 33.

A suitable base plate 35 is connected to and sup- 6 5 ported by thehorizontal base portions of the angle irons 32 and 33. This base platein turn supports and is connected to spaced angle bars and 31. As shownclearly in Figure 2, the rear end of these bars abut and are secured tothe front frame section 31' connecting the frame members I3, while theextreme front portions of these bars are suitably secured to the members32 and 33, respectively.

Within the confines of the base of the main frame section ill andforming a part thereof is a cross bar 35 extending substantiallyparallel to and in rear of the front frame section 31 and having itsends connected to the side frame members [3 of the base. Thisconstitutes a stop which limits the rear movement of the sand treatingdevice when it is placed in operative position in the frame and as shownin Figures 2 and 6, is of angle iron construction so that the rearrollers 25 of the sand treating device abut the vertical section of thebar.

Spaced side plates 39 are positioned between the bars 3'! and 38 andconstitute a track upon which the rear rollers 26 are adapted to ride.Secured to the outer longitudinal side portions of these plates areguide rods 40, each of which has its inner face inclined inwardly andrearwardly toward the bar 38. These rods are adapted to guide therollers 26 in their rearward movement and position the sand treatingdevice correctly in the frame. Secured to each guide adjacent its rearend is a locking bar or element 4! of substantially right angularconstruction having its horizontal flange 42 extending inwardly over butspaced from the guide 40 sufficiently to permit the extreme outerportion of the rear axle 25 to ride between these two members and to belocked therein against upward movement with respect to the base of theframe. Cooperating with the rear roller guide and looking elements 40and 42 is a front locking bar 43 having a front vertical wall 44, a topwall 45 and end walls 46 V The top wall 45 is also provided with acentrally disposed swivel receiving recess 41 which is adapted toembrace the swivel 28 while the top wall 45 extends over the frontrollers 38; Figures 2 and 5 clearly show the front locking element 43 inoperative'position between the bars 36 and 31, and it is retained inthis position by suitable cap screws 48 which extend through openings inboth the end walls 46 and bars 36 and 31. Suitable nuts 49 are securedto the inner faces of the end walls and receive the threaded shanks ofthe cap screws.

When it is desired to remove the sandtreating device from the frame H],the cap screws 48 are first unscrewed and the locking element 43 is thenlifted out of engagement with the swivel, front rollers, and the bars 35and 31. The device can then be moved forwardly, the rear roll-- ersriding on the plates 39 forwardly of the rear locking element 41 and thefront rollers riding forwardly on the plate 35 until they abut the frontcross bar 34. In this position the hopper 2! will be free of thedischarge spout 20 and the sand treating device may then be bodilylifted out of the frame by means of a suitable crane or other liftingmechanism (not shown). When it is desired to return the sand treatingdevice to the frame in order that it may be used in conjunction with thescreening device, the crane will set the device down into the base ofthe frame with the front rollers supported on the plate 35 and the rearrollers supported on the plates 39. The device may then be movedrearwardly until the rear rollers "25 abut cross rod 38,, with the endsof the axle 25 positioned beneath the flanges 42 of the rear lockingdevice 4|. The front locking element 43 may then be quickly dropped intoposition with the swivel 28 occupying the recess 41. By inserting andscrewing up the cap screws 48 the device is then looked in the frame andmay be operated in conjunction with the screening mechanism.

Referring to Figure 3, there is disclosed a modification of the frontlocking element. In this arrangement the front roller supporting plateand spaced side bars are eliminated. The front extension constitutesforwardly converging side plates 58 which connect with a front plate 5|.The rear ends of the plates 50 are secured to the front cross member 51corresponding to the front section 31'. The locking element 52 is thesame as element 43 with the exception that the end walls 53 are inclinedso as to extend parallel with the side plates 50 when the lockingelement is in operative position. Each side plate 50 and end wall 53 isprovided with recesses through which a cap screw 54 may be inserted andthe inner face of each end wall has secured thereto a suitable nut 55forreceiving the shank of the screw cap.

In Figure '7 there is shown an enlarged view of the low-er portion ofthe sand treating apparatus including the inclined sand belt 23, thehopper 2| and a lower hopper gate 58. This gate is shown in its normallyoperative position with the gate inclined downwardly and rearwardly atsubstantially a 45 angle to the belt, instead of being at right angle asis the usual custom. With this construction, the sand will fall from theinclined gate and cannot bridge or pile up against the gate, but willalways fall upon and be 'moved forwardly by the belt. The gate 58 isconnected to cross shaft 59 by means of suitable straps 60. The crossshaft is pivoted between opposite walls of the hopper and one end of theshaft is extended forwardly against the outer side of the hopper wall toform a. crank 5|. The end of this crank is pivotally' connected to the.forward end of an elongated gate operating r'od 62 which extendsrearwardly and upwardly and terminates in a curved handle 63. Thishandle is suitably supported in the upper end of the frame section l4,as shown in Figure l. The vertical flange 65 is provided with a slot 66through which the upper end of the handle projects. A stop element 61 issecured to the under side of the handle and this limits the upper andoutward movement of the handle. Normally the gate is in its closedposition as shown in Figures 1 and 7 with-the forward end of the crank6| resting upon the lateral flange 6| which limits the downward movementof the crank and thus prevents rearward movement of the lower half ofthe gate. When it is desired to open the gate to discharge accumulatedwaste material, the handle 63 is grasped and pulled upwardly. Thismovement raises the crank 61 and swings the lower end of the gateforwardly and upwardly. The stop 61 is so positioned on the rod 62 as toengage the flange 65 when the gate has been opened the desired amount.

It is to be understood that the rod 62 may be discarded if desired, andthe gate operated from the crank 6|. When the rod 62 is used, however,it is necessary that it be first removed before the sand treating devicecan be taken from the frame ID. This may be easily and quickly done byremoving the cotter pin 68 which retains the forward end of the rod 62upon the crank 6|.

The screening device is provided with means for retarding the passage ofmaterial lengthwise of the screen. This means comprises a plurality ofweighted arms each of which is pivoted to a transverse shaft. These armsare normally supported directly above the screen elements by suitablechains connected at their upper ends to a winding bar pivoted on theframe structure. Referring particularly to Figure 8, there are shown thescreening elements I! and the weighted levers is, the latter beingmounted on the shaft ll and normally supported by means of suitablechains 12. The upper link of each chain is threaded upon a U-bolt 13which is secured to one flange of a Winding bar 14 of angle stock andthis is connected at each end to stub shafts l5 journaled in the frameof the screening device. A rock arm 16 is fastened to one of the shaftsl5 and is connected to an operating handle 11 by a suitable link 18. Theinner end of the handle is pivoted on the shaft H. When it is desired tolift the weights as a unit above the screen mechanism, it is merelynecessary to grasp the handle 11 and move it downwardly. This rotatesthe shaft 15, raising the U-bolts l3, chains 12 and the weights I8. Withthis arrangement in which the handle is pivoted on the shaft H and isindirectly connected to one of the stub shafts through link 18 and crank16, greater leverage is secured and consequently there is a reduction inthe pull necessary for raising the weights l8.

It will be observed that the top frame bars I 2 support brackets 19which project outwardly beyond the confines of the frame and terminatein hooks 80. These are for the purpose of lifting and moving the entireapparatus from one point to another as desired.

Such variations from the construction herein shown and described as arewithin the skill of a mechanic may, of course, be made without.departing from the range of my invention.

I claim:-

1. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having rollers, and rollerengaging means detachably carried by the base and adapted to engage therollers and lock the sand treating device in operative position in theframe below the screening mechanism.

2. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having front rollers, saidbase having a pair of spaced bars between which the front rollers areadapted to move and be confined, and means for removably securing thesand treating device in said frame below the screening mechanismincluding a cross bar engageable with said rollers and detachablyconnected to said spaced bars.

3. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having front rollers, saidbase having a pair of spaced bars for receiving the rollers to supportthem and the sand treating device for movement from an operative. to aninoperative position relative to said screening mechanism, and meansincluding a cross bar of angle iron formation detachably mounted betweenthe spaced bars and adapted to embrace. the rollers for removablysecuring the sand treating device in operative position.

4. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having a front swivel androllers carried thereby, said base having a pair of spaced bars forreceiving the rollers to support them and the sand treating device formovement from an operative to 'an inoperative position relative to saidscreening mechanism, and means for removably securing the sand treatingdevice in operative position including a cross bar of angle ironformation adapted to embrace the rollers and having a recessed portionfor receiving the swivel.

5. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having front and rearrollers, said base being provided with rear roller supporting plates,locking elements located at the rear of said plates and adapted toretain the rear rollers in engagement with said plates, and means forlocking the front rollers in the base whereby the sand treating deviceis removably secured in said frame in operative position. below thescreening mechanism.

6. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having front and rearrollers, said base being provided with rear roller supporting plates,guide members carried by and extending longitudinally of said plates,locking elements located at the rear of said guides and adapted toretain the rear rollers in engagement with said plates, and means forlocking the front rollers in the base whereby the sand treating deviceis removably secured in said frame in operative position below thescreening mechanism.

'7. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toreceive and support a sand treating device having front and rearrollers, said base being provided with rear roller supporting plates,guide members carried by and extending longitudinally of said plates,rear roller locking elements of angle iron formation located at the rearof said plates and guides, each locking element having a vertical flangeprojecting upwardly from the outer side of its respective guide and ahorizontal flange spaced from and extending inwardly over the guide andforming therewith a groove for receiving one end of the rear rolleraxle, and means for locking the front rollers in the base whereby thesand treating device is removably secured in said frame in operativeposition below the screening mechanism.

8. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base to receive andsupport a sand treating device for movement on the base from anoperative to inoperative position relative to said screening mechanism,and means carried by said frame for removably securing the sand treatingdevice in operative position.

9. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base Ill adapted toremovably support a sand treating device having rollers, and tracks onthe base for receiving the rollers to support them and the sand treatingdevice for movement from an operative to an inoperative positionrelative to said screening mechanism whereby the sand treating devicemay thereafter be removed from the frame.

10. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, said frame having a base adapted toremovably support a sand treating device having rollers, and tracks onthe base for receiving the rollers to support them and the sand treatingdevice for movement from an opmechanism whereby the sand treating devicemay thereafter be removed from the frame.

12. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, the lower portion of said frame beingopen and having a base projecting outwardly from the frame and adaptedto removably support a sand treating device below the screeningmechanism for movement from an operative position within the frame to aninoperative position substantially exteriorly of the frame whereby thesand treating device may thereafter be removed from the frame.

13. A frame for use in sand conditioning adapted to support a screeningmechanism in elevated position, the lower portion of said frame beingopen and having a base projecting outwardly from the frame and adaptedto removably support a sand treating device below the screeningmechanism for movement from an operative position within the frame to aninoperative position substantially exteriorly of the frame whereby thesand treating device may thereafter be removed from the frame, and meanscarried by the projecting portion of the base and engageable with thesand treating device for removably securing the latter in operativeposition.

STANLEY B. DAVIES.

